crypto/dpaa2_sec: add check for segmented buffer
crypto/dpaa2_sec: add check for segmented buffer

The code would crash for segmented buffer if no check.

Fixes: 8d1f3a5d751b ("crypto/dpaa2_sec: support crypto operation")
Cc: stable@dpdk.org

Signed-off-by: Alok Makhariya <2a855003566fd3c196048269bdc7b0aedd2dfcb4@nxp.com>
Acked-by: Akhil Goyal <74d7c4c993a22c1d4f60c46ff3d95c969a24a25c@nxp.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk